CESSNA 320C — Maintenance Manual

This document is an Advisory Circular (AC 20-37E) issued by the FAA, focusing on aircraft propeller maintenance. It provides essential information and procedures for owners, operators, and FAA-certified maintenance personnel regarding the care and maintenance of aircraft propellers throughout their service life. The AC outlines minimum requirements for propeller field maintenance and includes a checklist for annual inspections. It emphasizes the importance of proper maintenance to prevent failures and enhance the longevity of propellers, which are critical components subjected to high-stress conditions. The document also discusses various types of propeller damage, inspection methods, and maintenance requirements, ensuring that users have access to current guidance and best practices for propeller care.

• Propellers are subject to high-stress conditions and require regular maintenance to ensure safety and performance.
• Common types of propeller damage include corrosion, nicks, cracks, and erosion, particularly in the blade tip region.
• Inspection methods include visual, penetrant, ultrasonic, eddy current, and magnetic particle inspections, each requiring trained personnel.
• Periodic reconditioning and overhaul of propellers are necessary to prevent failures from hidden damage.
• Accurate maintenance records are essential for compliance with FAA regulations.